Taim, you are an example of the weird tendency of people today to omit an apostrophe on possessives, and add an apostrophe on plurals. It is actually the other way around. We learned that in grade school, but many people have a sort of grammatical dyslexia about it. And, by the way, the title is correct.

Actually, Anarchy, you are mistaken. The “worlds’ ” would imply more than one world. He is speaking of bowling on one planet, so the apostrophe needs to be on the inside of the “s.” I would think that would be obvious.